Methods to turn George Best into a Northern Ireland International
Add this code to the Picture class. Note that there are two public methods: the void method demonstrated in class that changes the original picture and a corresponding Picture method that returns an Irish-jerseyed version of the original.
/*
* georgeBestEffect -- REMOVEDge a rectangle within picture (e.g. football jersey)
* from Manchester United red to Northern Ireland green.
*/
public void georgeBestEffect(int left, int right, int top, int bottom, double threshold) {
for (int x = left; x < this.getWidth() && x < right; x++) {
for (int y = top; y < this.getHeight() && y < bottom; y++) {
// Make the red pixels in this area corresponding shade of green.
Pixel pix = this.getPixel(x, y);
if (!this.isGreenAlready(pix, threshold)) {
pix.setColor(irishColor(pix));
}
}
}
}
// Is the pixel green already (e.g. grass, white shorts)?
private boolean isGreenAlready(Pixel pixel, double limit) {
return (pixel.getGreen() > limit);
}
// The corresponding Northern Ireland color to the color of a pixel
private java.awt.Color irishColor(Pixel pixel) {
int redVal = pixel.getGreen();
int greenVal = (int) (pixel.getRed() * 0.7);
int blueVal = pixel.getBlue();
return new java.awt.Color(redVal, greenVal, blueVal);
}
/*
* Return a new picture that is a George Best effect of this picture.
* Left, right, top, and bottom are the rectangle bounds for the effect.
* Threshold determines what intensity of green in the pixels is ignored.
*/
public Picture makeGeorgeBestEffect(int left, int right, int top, int bottom, double threshold) {
Picture gbPic = new Picture(this.getWidth(), this.getHeight());
gbPic.copyPicture(this);
gbPic.georgeBestEffect(left, right, top, bottom, threshold);
return gbPic;
}
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